Finding the Fourth Proportional to 111.34, 166.74 and 74.74

Step by Step Solution

1. Step 1: Write the proportion equation
   111.34 : 166.74 = 74.74 : x
2. Step 2: Convert to fraction form
   111.34/166.74 = 74.74/x
3. Step 3: Cross multiply
   111.34x = 166.74 × 74.74
4. Step 4: Simplify right side
   111.34x = 12,462.15
5. Step 5: Solve for x
   x = 12,462.15/111.34
6. Step 6: Final answer
   x = 111.93